GAU-21 to become main machine gun for USMC's assault support helicopters
In future, all USMC's CH-53E and the UH-1Y helicopters will be armed with the M3M FN Herstal GAU-21 .50-caliber machine gun.
Currently, these helicopters fly with the M2 Browning GAU-16/A machine gun which is more prone to jamming and fires at a slower rate.
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